The question is HOW RENDERING SEQUENTIAL IMAGES? I can import sequential but I can't export. It is very strange. I working with VFX on Linux OS, and I use sequential and mov format as well. Kdelive very good soft for VFX editing on Linux, but I cant render usable format (usually I use sequential or MOV format for work like everybody who working with cgi) . May be somebody solve this problem?

Did you search the forum before opening this thread?

Maybe one of these, is what you want...
http://www.kdenlive.org/forum/export-video-image-sequence
or
http://www.kdenlive.org/forum/exporting-image-sequence
or
http://www.kdenlive.org/forum/render-image-sequence-bmp